Update automation rule

Creates a new automation rule. Set rule_type to 'trigger' for condition-based rules or 'schedule' for time-based rules. Each action's params object is action-specific JSON; for 'Change Temperature Control' it accepts the ATM bucket (enabled, startupMinutes, postRampMinutes, minimumProfile, maximumProfile, temperatureBuffer) plus the watt floor minimumPower (0 to remove an existing floor, otherwise a whole number of watts from 500 to 8000; the snake_case spelling minimum_power is rejected here), plus chip and water-inlet thresholds (e.g. chipHotTemperature, chipTargetTemperature, chipDangerousTemperature, waterInletHotTemperature, waterInletStartupTemperature, waterInletDangerousTemperature). For 'Change Mining Profile' it accepts settings: a non-empty array of per-firmware entries, each keyed by firmware. luxos takes powerTarget (whole watts from 500 to 8000) and optionally the AutoTuner band powerLimit and powerMin in the same range, ordered powerMin <= powerTarget <= powerLimit; powerMin accepts 0 to remove an existing floor. The band is LuxOS-only and requires a recent LuxOS build — older firmware rejects the whole power-target command. antminer and whatsminer take profileStep only; avalon is rejected, as Avalon firmware does not support power changes; fluxos takes exactly one of powerTarget or profileStep. Unknown keys are rejected per entry, including snake_case spellings such as power_limit and power_min.